Faced up with migration form Drupal 7 to 8(9). Migration process was processed with standart module "upgrade" from UI. The task was to migrate an old image field to media.
Solution was found with hook_update.
First of all check if the image is already present in DB. It could be by the previous runs etc
$medias_thumb = \Drupal::entityTypeManager() ->getStorage('media') ->loadByProperties([ 'bundle' => [$convert['media_bundle']], 'name' => $node->{$old_field}->entity->label()] ); if (!empty($medias_thumb)) { $new_field = $convert['new_node_image_field']; $node->{$new_field}->entity = reset($medias_thumb); $node->save(); \Drupal::logger('image_to_media')->notice( sprintf('Reuse IMAGE_THUMB for node "%s".', $node->getTitle()) ); }
If there is no image in the DB load it and create a copy in new field.
if (!empty($medias)) { $media = reset($medias); $file_id = $media->field_media_image->target_id; $file = File::load($file_id); $new_field = $convert['new_node_image_field']; $node->{$new_field}->entity = _mymodule_create_media_image_entity( $convert['media_bundle'], $file, $node->{$old_field}->alt ); $node->save(); $media_ids_remove[] = $media->id(); \Drupal::logger('image_to_media')->notice( sprintf('Reuse media for node "%s".', $node->getTitle()) ); }
Full version of script located here https://gist.github.com/onesixromcom/d8be7e86c25821aea30a6fb5f380ddf2
To run this hook use drush command:
drush php-eval "module_load_install('mymodule_custom'); mymodule_custom_update_8801();"
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